A) blue
B) yellow
C) green
D) red
Correct Answer: A
Solution :
: By Stefans law of radiation, \[R=\sigma {{T}^{4}}\]where \[\sigma =5.67\times {{10}^{-8}}W{{m}^{-2}}{{K}^{-4}}\] or \[{{T}^{4}}=\frac{R}{\sigma }=\frac{1.2\times {{10}^{7}}}{5.67\times {{10}^{-8}}}\] or \[T=3814\text{ }K\] The star at 3814 K will appear blue.You need to login to perform this action.
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